Improved snap-hook



UNITED STATEs PATENT OFFICE.

EDWARD A. COOPER, OF BUFFALO, NEW YORK.

rMPRov'ED SNAP-HOOK. l

Speeijcction forming part of Letters Patent No. 83,134, dated October20, 1868.

To all whom it may concern: f

Be it known that I, EDWARD A. COOPER, of the city of Buffalo, county ofErie, a-nd State of New York, have invented certain new and usefulImprovements in Snap-Hooks 5 and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, making a part of this specification, inwhich- Figure I is a longitudinal section. Fig. II is a cross-section.Fig. III is a sectional view of tongue before its connection with thehook. Fig. IV is a plan of the hook with the tongue removed, v

Like letters refer to like parts in each of the figures.

My invention consists in the special construction and arrangement of asnap-hook, as hereinafter set forth.

A represents the hook 5 B, the shank there of, and C the loop by whichthe hook is connected to the desired part of the harness. D representsthe tongue hinged to the shank, and closing the mouth of the hook, thetongue-spring-D' keeping the tongue in place.

The shank B is cast with a longitudinal groove or chamber, B' for thereception of the spring D', and to allow the required movement of thetongue to unclose the mouth of the hook. The hinge-pin e, to which thetongue is jointed, extends across the groove B', and is rigidlyconnected at both ends to the sides of the groove by being cast in thesame piece with the shank. The groove is made to cut entirely throughthe shank opposite this hingepin e, as shown at e', so that the hook maybe molded without the use of cores.

The tongue is cast in the form shown in Fig. III, the eye by which it isconnected to the hinge-pin being open-,so that it may be applied to saidhinge-pin, and the connection formed by bending the endf of the tonguearound the hinge-pin, as seen in Fig. I. A

most cheap, simple, and durable hinging of theI tongue to the shank isaccomplished in this manner.

An opening, g, is made from the groove B' through the shank, whichopening is partially covered by a cross-bar, h, cast with the shank, theopening g allowing it to be so cast without coring. One end of thesemi-elliptic spring D is inserted between this cross-bar and the bottomof the groove, and securely fastened by simply setting down saidcross-bar.

The inside of the tongue is grooved, as shown at t', to receive andprotect the other end of the spring D', and retain the same laterally inposition. A

`It is apparent that one end of the spring might be attached to thetongue instead of the shank by the same means as above described.

The great desideratum in the manufacture of harness-snaps, in additionto strength and durability, is cheapness of construction, which can onlybe obtained by reducing the amount of labor` required to mold and castthe `parts and put them together to the minimum.

It is believed the abovedescribed device fully meets the want, both asto strength, durability, and cheapness, as no cores are required in themolding and no rivets in the putting together.

Having thus described my invention, what I claim as my invention, anddesire to secure by Letters Patent, is-

The hook A, cast with hinge-pin e and cross-bar h, in combination withthe grooved tongue D and bow-spring h, when the parts are arranged andsecured together in the manner described.

EDWARD A. COOPER.

Witnesses V. H. BECKER, G. BURKHARDT.

